19919480

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10163}}^1$

素因数の和:10188

約数の個数: 48

約数和(自身を含む): 52141320

約数和(自身を除く): 32221840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10163, 20326, 40652, 50815, 71141, 81304, 101630, 142282, 203260, 284564, 355705, 406520, 497987, 569128, 711410, 995974, 1422820, 1991948, 2489935, 2845640, 3983896, 4979870, 9959740, 19919480]

約数ペア:

[(1, 19919480), (2, 9959740), (4, 4979870), (5, 3983896), (7, 2845640), (8, 2489935), (10, 1991948), (14, 1422820), (20, 995974), (28, 711410), (35, 569128), (40, 497987), (49, 406520), (56, 355705), (70, 284564), (98, 203260), (140, 142282), (196, 101630), (245, 81304), (280, 71141), (392, 50815), (490, 40652), (980, 20326), (1960, 10163)]